Field the soil copper concentration

Initial

A

20.95 ± 4.30

B

22.09 ± 0.41

C

20.69 ± 0.76

D

15.26 ± 0.24

E

18.45 ± 0.56

F

18.87 ± 0.31

G

16.78 ± 0.39

H

14.19 ± 0.29

I

13.85 ± 0.13

J

13.66 ± 0.21